<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>数据统计</el-breadcrumb-item>
		  <el-breadcrumb-item>数据报表</el-breadcrumb-item>
		</el-breadcrumb>
		
		<!-- 卡片视图区域 -->
		<el-card>
			<!-- 2.为 ECharts 准备一个定义了宽高的 DOM -->
			 <div id="main" style="width: 600px;height:400px;"></div>
		</el-card>
	</div>
</template>

<script>
	// 1.导入echarts
	// import echarts from 'echarts'
	import * as echarts from 'echarts'
	import _ from 'lodash'
	
	export default {
		data() {
			return {
				// 需要合并的对象
				options: {
				        title: {
				          text: '用户来源'
				        },
				        tooltip: {
				          trigger: 'axis',
				          axisPointer: {
				            type: 'cross',
				            label: {
				              backgroundColor: '#E9EEF3'
				            }
				          }
				        },
				        grid: {
				          left: '3%',
				          right: '4%',
				          bottom: '3%',
				          containLabel: true
				        },
				        xAxis: [
				          {
				            boundaryGap: false
				          }
				        ],
				        yAxis: [
				          {
				            type: 'value'
				          }
				        ]
				      }
			}
		},
		created() {
			
		},
		// mounted在页面元素，已经被渲染完毕了才执行!
		async mounted() {
			 // 3.基于准备好的dom，初始化echarts实例
			var myChart = echarts.init(document.getElementById('main'));
			
			const {data: res} =await this.$http.get('reports/type/1')
			if (res.meta.status !== 200) {
				return this.$message.error('获得折线图数据失败！')
			}
			
			// 4.指定图表的配置项和数据
			const result = _.merge(res.data, this.options)
			
			// 使用刚指定的配置项和数据显示图表。
			myChart.setOption(result);
	
		},
		methods: {
			
		}
	}
</script>

<style lang="less" scoped>
</style>